Godot 官方2D C#重构(1)：雪花碰撞

前言

Godot 官方教程

Godot 2d 官方案例C#重构专栏

Godot 2d 重构 github地址

实现效果

在这里插入图片描述

难点介绍

Godot GDScript和C# 对应关系大部分靠猜

文件导入

资源地址：默认为res://开头
2D贴图导入类型：Texture2D

public Texture2D Bullet_Image = new Texture2D();
Bullet_Image = GD.Load<Texture2D>("res://bullet.png");

2D属性赋值，PhysicsServer

PhysicsServer 用于给赋值属性和属性初始化

Shape = PhysicsServer2D.CircleShapeCreate();
PhysicsServer2D.ShapeSetData(Shape,8);

刷新UI

在_Process里面调用QueueRedraw

public override void _Process(double delta)
{QueueRedraw();
}

绘制UI

生成2D贴图

DrawTexture(Texture2D img, Vector2 position);

重载_Draw函数

    public override void _Draw(){var offset = -Bullet_Image.GetSize();//Godot重载了对应的运算符offset = offset /2;foreach (var item in bullets){DrawTexture(Bullet_Image, item.position + offset);}base._Draw();}

离开页面销毁

销毁

PhysicsServer2D.FreeRid(item.body);

离开页面销毁

    public override void _ExitTree(){foreach (var item in bullets){PhysicsServer2D.FreeRid(item.body);}PhysicsServer2D.FreeRid(Shape);base._ExitTree();}

定位到鼠标位置

重载 _Input函数，获取鼠标参数

public override void _Input(InputEvent @event)
{if(@event is InputEventMouseMotion){var mouseEvent = (@event as InputEventMouseMotion);Position = mouseEvent.Position;}base._Input(@event);
}